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參數資料
| 型號： | LC01700PW |
| 元件分類： | 調諧器 |
| 英文描述： | AUDIO TUNER, PQFP48 |
| 封裝： | 7 X 7 MM, SQFP-48 |
| 文件頁數： | 17/18頁 |
| 文件大小： | 141K |
| 代理商： | LC01700PW |
LA7458W
No.A0642-8/22
Continued from preceding page.
Pin
No.
Pin name
DC
voltage
AC
voltage
Function
Equivalent Circuit
7
ALC FILTER
An external capacitor is connected
between this pin and ground for ALC
detection.
IR MIC
≈ 0.4μA
LINE
≈ 0.1μA
8
GND
Ground for the block that handles
low-level audio signals.
9
WEIGHTING
1.575V
Audio weighting characteristics are
created by an external capacitor
connected to this pin and an internal
2.9k
Ω resistor.
10
NR FWR
1.575V
Audio weighting characteristics are
created by an external capacitor
connected to this pin and an internal
4.5k
Ω resistor.
11
NR HOLD
The NR characteristics hold function
is created by connecting an external
capacitor between this pin and
ground.
12
NR DET
The NR signal is detected by
connecting an external capacitor
between this pin and ground.
13
VCA BIAS
1.575V
Adds bias to the NR VCA.
14
EMPHASIS2
1.575V
This pin creates the NR emphasis 2
characteristics.
Continued on next page.
7
30k
Ω
IR
VCC
10
9
4.5k
Ω
2.9k
Ω
VCC1
300k
Ω
1k
Ω
200
Ω
11
12
VCC1
13
20k
Ω
5k
Ω
VCC1
14
4.8k
Ω
2.8k
Ω
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